Sometimes, we may run into the ‘RangeError: argument is not a valid code point’ when we’re developing JavaScript apps.
In this article, we’ll look at how to fix the ‘RangeError: argument is not a valid code point’ when we’re developing JavaScript apps.
Fix the ‘RangeError: argument is not a valid code point’ When Developing JavaScript Apps
To fix the ‘RangeError: argument is not a valid code point’ when we’re developing JavaScript apps, we should make sure that we call the String.fromCodePoint method with a valid code point value.
For instance, the following will throw this error:
String.fromCodePoint('_');
String.fromCodePoint(Infinity);
String.fromCodePoint(-1);
String.fromCodePoint(3.14);
String.fromCodePoint(3e-2);
String.fromCodePoint(NaN);
These values aren’t numbers that represent characters in the Unicode character set, so the calls above will all throw errors.
On the other hand, the following won’t throw the error since the arguments are all valid Unicode code point values:
String.fromCodePoint(42);
String.fromCodePoint(65, 90);
String.fromCodePoint(0x404);
String.fromCodePoint(0x2F804);
String.fromCodePoint(194564);
String.fromCodePoint(0x1D306, 0x61, 0x1D307)
Conclusion
To fix the ‘RangeError: argument is not a valid code point’ when we’re developing JavaScript apps, we should make sure that we call the String.fromCodePoint method with a valid code point value.
